Oral glucose load and human cutaneous microcirculation : an insight into flowmotion assessed by wavelet transform

Silva, Henrique (author), Šorli, Jernej (author), Lenasi, Helena (author)

Microcirculation in vivo has been assessed using non-invasive technologies such as laser Doppler flowmetry (LDF). In contrast to chronic hyperglycemia, known to induce microvascular dysfunction, the effects of short-term elevations in blood glucose on microcirculation are controversial. We aimed to assess the impact of an oral glucose load (OGL) on the cutaneous microcirculation of healthy subjects, quantified by LDF and coupled with wavelet transform (WT) as an interpretation tool. On two separate occasions, sixteen subjects drank either a glucose solution (75 g in 250 mL water) or water (equal volume). LDF signals were obtained in two anatomical sites (forearm and finger pulp) before and after each load (pre-load and post-load, respectively), in resting conditions and during post-occlusive reactive hyperemia (PORH). The WT allowed decomposition of the LDF signals into their spectral components (cardiac, respiratory, myogenic, sympathetic, endothelial NO-dependent). The OGL blunted the PORH response in the forearm, which was not observed with the water load. Significant differences were found for the cardiac and sympathetic components in the glucose and water groups between the pre-load and post-load periods. These results suggest that an OGL induces a short-term subtle microvascular impairment, probably involving a modulation of the sympathetic nervous system.

• Language: English
• Keywords: diabetes mellitus, microcirculation, laser Doppler flowmetry, wavelet transform, oral glucose load, flowmotion, post-occlusive reactive hyperemia
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: MF - Faculty of Medicine
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 17 str.
• Numbering: Vol. 10, iss. 10, art. 953
• PID: 20.500.12556/RUL-136335
• UDC: 612
• ISSN on article: 2079-7737
• DOI: 10.3390/biology10100953
• COBISS.SI-ID: 83675651
• Publication date in RUL: 25.04.2022

Record is a part of a journal

• Title: Biology
• Shortened title: Biology
• Publisher: MDPI
• ISSN: 2079-7737
• COBISS.SI-ID: 523004441

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.10.2021

Secondary language

• Language: Slovenian
• Keywords: sladkorna bolezen, mikrocirkulacija, laserska Dopplerjeva flowmetrija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P3-0019
• Name: Aplikativna in bazična fiziologija in patofiziologija v medicini